Tralles (Moon)

Named after Johann Georg Tralles - German physicist (1763-1822).

Tralles is an irregular lunar crater that is attached to the northwestern rim of the much larger crater Cleomedes, in the northeastern part. Within one crater diameter to the northwest is Debes. This is an oddly shaped crater formation with an irregular perimeter. The rugged interior has the appearance of three overlapping craters, with one at the south end, a second to the northeast and a third to the northwest. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.